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Quote: Now we can make an experiment that demonstrates this. We can make particles that are very small at first, and then gradually grow in size. We use a solution of sodium thiosulfate (hypo) with sulfuric acid, which precipitates very fine grains of sulfur. As the sulfur precipitates, the grains first start very small, and the scattering is a little bluish. As it precipitates more it gets more intense, and then it will get whitish as the particles get bigger. In addition, the light which goes straight through will have the blue taken out. That is why the sunset is red, of course, because the light that comes through a lot of air, to the eye has had a lot of blue light scattered out, so it is yellow-red. Unquote.
I need advice to check have I correctly understood. The light when is going through the atmosphere is absorbed and re-emitted (scattered ) by atoms' electrons. There is the formula
According to it blue light takes 16 times more scattered energy than red light, as the blue has 2 times higher frequency. But frequency ω that enters into the formula is the frequency of scattered light. So (1): where is blue light from incident beam? I've found several demonstrations on youtube (e.g. youtube.com/embed/LSf7iRD5Jws ). And it looks like the light from a lamp loses blue. And (2): even if blue light re-emitted more intensively, last layer of atoms before eye must absorb red light and re-emit white light. So we have the statement that light keeps its frequency and ωincident = ωscattered . (3) When a wave goes through an atom, electrons begin to oscillate and emit: https://s.sender.mobi/u/image/2016/10/19/wl-chKHAa/-.PNG . Electrons emit in all directions in sheet plane whole absorbed energy, but 16/17 of it is blue and 1/17 of it is red light. Then the light from a lamp (which goes form right to left) must lose same amount of blue light as was emitted by electron.
Is it correct?
Username160611000000 (
talk) 04:07, 19 October 2016 (UTC)
Is that true that for increasing testosterone hormone it's good to eat a lot of fats (or food which rich with fats)? I saw a youtuber which said it but I don't believe anything without scientific evidence. I would like to ensure or deny it. thank you 93.126.88.30 ( talk) 19:34, 19 October 2016 (UTC)
may dead bodies infect life bodies with hepatitis or HIV? I'm asking it because I have a doubt if this viruses need nutrition or oxygen etc. in order to exist. 19:37, 19 October 2016 (UTC) — Preceding unsigned comment added by 93.126.88.30 ( talk)
Yes it can. Very easy to prove. Just because the person died 10 seconds ago does not mean their body cannot infect your body with hepatitis or HIV if you have unprotected sex with the corpse. 175.45.116.99 ( talk) 06:00, 20 October 2016 (UTC)
Apologies if this is a stupid question; however, I am genuinely curious as to whether or not people with prosthetic balls experience as much pain as people with natural/biological balls experience when they get kicked in the balls.
Anyway, does anyone here have any thoughts and/or data in regards to this? 128.195.178.33 ( talk) 22:13, 19 October 2016 (UTC)
Science desk | ||
---|---|---|
< October 18 | << Sep | October | Nov >> | October 20 > |
Welcome to the Wikipedia Science Reference Desk Archives |
---|
The page you are currently viewing is an archive page. While you can leave answers for any questions shown below, please ask new questions on one of the current reference desk pages. |
Quote: Now we can make an experiment that demonstrates this. We can make particles that are very small at first, and then gradually grow in size. We use a solution of sodium thiosulfate (hypo) with sulfuric acid, which precipitates very fine grains of sulfur. As the sulfur precipitates, the grains first start very small, and the scattering is a little bluish. As it precipitates more it gets more intense, and then it will get whitish as the particles get bigger. In addition, the light which goes straight through will have the blue taken out. That is why the sunset is red, of course, because the light that comes through a lot of air, to the eye has had a lot of blue light scattered out, so it is yellow-red. Unquote.
I need advice to check have I correctly understood. The light when is going through the atmosphere is absorbed and re-emitted (scattered ) by atoms' electrons. There is the formula
According to it blue light takes 16 times more scattered energy than red light, as the blue has 2 times higher frequency. But frequency ω that enters into the formula is the frequency of scattered light. So (1): where is blue light from incident beam? I've found several demonstrations on youtube (e.g. youtube.com/embed/LSf7iRD5Jws ). And it looks like the light from a lamp loses blue. And (2): even if blue light re-emitted more intensively, last layer of atoms before eye must absorb red light and re-emit white light. So we have the statement that light keeps its frequency and ωincident = ωscattered . (3) When a wave goes through an atom, electrons begin to oscillate and emit: https://s.sender.mobi/u/image/2016/10/19/wl-chKHAa/-.PNG . Electrons emit in all directions in sheet plane whole absorbed energy, but 16/17 of it is blue and 1/17 of it is red light. Then the light from a lamp (which goes form right to left) must lose same amount of blue light as was emitted by electron.
Is it correct?
Username160611000000 (
talk) 04:07, 19 October 2016 (UTC)
Is that true that for increasing testosterone hormone it's good to eat a lot of fats (or food which rich with fats)? I saw a youtuber which said it but I don't believe anything without scientific evidence. I would like to ensure or deny it. thank you 93.126.88.30 ( talk) 19:34, 19 October 2016 (UTC)
may dead bodies infect life bodies with hepatitis or HIV? I'm asking it because I have a doubt if this viruses need nutrition or oxygen etc. in order to exist. 19:37, 19 October 2016 (UTC) — Preceding unsigned comment added by 93.126.88.30 ( talk)
Yes it can. Very easy to prove. Just because the person died 10 seconds ago does not mean their body cannot infect your body with hepatitis or HIV if you have unprotected sex with the corpse. 175.45.116.99 ( talk) 06:00, 20 October 2016 (UTC)
Apologies if this is a stupid question; however, I am genuinely curious as to whether or not people with prosthetic balls experience as much pain as people with natural/biological balls experience when they get kicked in the balls.
Anyway, does anyone here have any thoughts and/or data in regards to this? 128.195.178.33 ( talk) 22:13, 19 October 2016 (UTC)